Earlier this week my 521 would not unlock. The screen remained black after pressing the power button. I noticed that holding the camera button would make the typical vibration of opening the camera app, but the screen remained black. If I took out the battery and restarted it worked as usual for about 10min (with lock/unlock function) and then would get stuck either unlockable or with a black screen. If it is stuck unlockable, holding the power button still prompts me to slide to power down. So the button is not physically broken, it's a software thing. How could the power button become uncoupled from the lock function?
I factory reset the phone and it cured the problem for 2 days, but it has just reverted. Anybody have any ideas? I can't find anyone experiencing anything similar with this phone. Thanks in advance.
I factory reset the phone and it cured the problem for 2 days, but it has just reverted. Anybody have any ideas? I can't find anyone experiencing anything similar with this phone. Thanks in advance.